I am running a python script in IronPython 2.7 for a few times continuously with same variable and same DLL and it reported as CRASH after finished 3rd execution. There is no issue if I run once. But, it never happen on Python 2.7 and 3.3. Please help me...

Basically, I am sending a command "CLOSEDLOOP{SOURCE|VOLTAGE|CH2|0.5|0|10|1000}" to the DLL and DLL is controling a power supply via GPIB. The power supply starts to perform Linearity Ramp from 0V to 10V with step size 0.5 with settling time is 1000ms. Every execution it will reporting STATUS of the Power Supply from